CodeGenDAGPatterns.cpp [plain text]
#include "CodeGenDAGPatterns.h"
#include "Record.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Debug.h"
#include <set>
#include <algorithm>
using namespace llvm;
static inline bool isInteger(MVT::SimpleValueType VT) {
return EVT(VT).isInteger();
}
static inline bool isFloatingPoint(MVT::SimpleValueType VT) {
return EVT(VT).isFloatingPoint();
}
static inline bool isVector(MVT::SimpleValueType VT) {
return EVT(VT).isVector();
}
EEVT::TypeSet::TypeSet(MVT::SimpleValueType VT, TreePattern &TP) {
if (VT == MVT::iAny)
EnforceInteger(TP);
else if (VT == MVT::fAny)
EnforceFloatingPoint(TP);
else if (VT == MVT::vAny)
EnforceVector(TP);
else {
assert((VT < MVT::LAST_VALUETYPE || VT == MVT::iPTR ||
VT == MVT::iPTRAny) && "Not a concrete type!");
TypeVec.push_back(VT);
}
}
EEVT::TypeSet::TypeSet(const std::vector<MVT::SimpleValueType> &VTList) {
assert(!VTList.empty() && "empty list?");
TypeVec.append(VTList.begin(), VTList.end());
if (!VTList.empty())
assert(VTList[0] != MVT::iAny && VTList[0] != MVT::vAny &&
VTList[0] != MVT::fAny);
array_pod_sort(TypeVec.begin(), TypeVec.end());
TypeVec.erase(std::unique(TypeVec.begin(), TypeVec.end()), TypeVec.end());
}
bool EEVT::TypeSet::hasIntegerTypes() const {
for (unsigned i = 0, e = TypeVec.size(); i != e; ++i)
if (isInteger(TypeVec[i]))
return true;
return false;
}
bool EEVT::TypeSet::hasFloatingPointTypes() const {
for (unsigned i = 0, e = TypeVec.size(); i != e; ++i)
if (isFloatingPoint(TypeVec[i]))
return true;
return false;
}
bool EEVT::TypeSet::hasVectorTypes() const {
for (unsigned i = 0, e = TypeVec.size(); i != e; ++i)
if (isVector(TypeVec[i]))
return true;
return false;
}
std::string EEVT::TypeSet::getName() const {
if (TypeVec.empty()) return "isUnknown";
std::string Result;
for (unsigned i = 0, e = TypeVec.size(); i != e; ++i) {
std::string VTName = llvm::getEnumName(TypeVec[i]);
if (VTName.substr(0,5) == "MVT::")
VTName = VTName.substr(5);
if (i) Result += ':';
Result += VTName;
}
if (TypeVec.size() == 1)
return Result;
return "{" + Result + "}";
}
bool EEVT::TypeSet::MergeInTypeInfo(const EEVT::TypeSet &InVT, TreePattern &TP){
if (InVT.isCompletelyUnknown() || *this == InVT)
return false;
if (isCompletelyUnknown()) {
*this = InVT;
return true;
}
assert(TypeVec.size() >= 1 && InVT.TypeVec.size() >= 1 && "No unknowns");
switch (TypeVec[0]) {
default: break;
case MVT::iPTR:
case MVT::iPTRAny:
if (InVT.hasIntegerTypes()) {
EEVT::TypeSet InCopy(InVT);
InCopy.EnforceInteger(TP);
InCopy.EnforceScalar(TP);
if (InCopy.isConcrete()) {
TypeVec[0] = InVT.TypeVec[0];
return true;
}
if (!InCopy.isCompletelyUnknown())
return false;
}
break;
}
if ((InVT.TypeVec[0] == MVT::iPTR || InVT.TypeVec[0] == MVT::iPTRAny) &&
hasIntegerTypes()) {
bool MadeChange = EnforceInteger(TP);
if ((InVT.TypeVec[0] == MVT::iPTR || InVT.TypeVec[0] == MVT::iPTRAny) &&
TypeVec.size() != 1) {
TypeVec.resize(1);
TypeVec[0] = InVT.TypeVec[0];
MadeChange = true;
}
return MadeChange;
}
bool MadeChange = false;
TypeSet InputSet(*this);
for (unsigned i = 0; i != TypeVec.size(); ++i) {
bool InInVT = false;
for (unsigned j = 0, e = InVT.TypeVec.size(); j != e; ++j)
if (TypeVec[i] == InVT.TypeVec[j]) {
InInVT = true;
break;
}
if (InInVT) continue;
TypeVec.erase(TypeVec.begin()+i--);
MadeChange = true;
}
if (!TypeVec.empty())
return MadeChange;
TP.error("Type inference contradiction found, merging '" +
InVT.getName() + "' into '" + InputSet.getName() + "'");
return true; }
bool EEVT::TypeSet::EnforceInteger(TreePattern &TP) {
TypeSet InputSet(*this);
bool MadeChange = false;
if (TypeVec.empty()) {
*this = TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
MadeChange = true;
}
if (!hasFloatingPointTypes())
return MadeChange;
for (unsigned i = 0; i != TypeVec.size(); ++i)
if (isFloatingPoint(TypeVec[i]))
TypeVec.erase(TypeVec.begin()+i--);
if (TypeVec.empty())
TP.error("Type inference contradiction found, '" +
InputSet.getName() + "' needs to be integer");
return MadeChange;
}
bool EEVT::TypeSet::EnforceFloatingPoint(TreePattern &TP) {
TypeSet InputSet(*this);
bool MadeChange = false;
if (TypeVec.empty()) {
*this = TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
MadeChange = true;
}
if (!hasIntegerTypes())
return MadeChange;
for (unsigned i = 0; i != TypeVec.size(); ++i)
if (isInteger(TypeVec[i]))
TypeVec.erase(TypeVec.begin()+i--);
if (TypeVec.empty())
TP.error("Type inference contradiction found, '" +
InputSet.getName() + "' needs to be floating point");
return MadeChange;
}
bool EEVT::TypeSet::EnforceScalar(TreePattern &TP) {
TypeSet InputSet(*this);
bool MadeChange = false;
if (TypeVec.empty()) {
*this = TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
MadeChange = true;
}
if (!hasVectorTypes())
return MadeChange;
for (unsigned i = 0; i != TypeVec.size(); ++i)
if (isVector(TypeVec[i]))
TypeVec.erase(TypeVec.begin()+i--);
if (TypeVec.empty())
TP.error("Type inference contradiction found, '" +
InputSet.getName() + "' needs to be scalar");
return MadeChange;
}
bool EEVT::TypeSet::EnforceVector(TreePattern &TP) {
TypeSet InputSet(*this);
bool MadeChange = false;
if (TypeVec.empty()) {
*this = TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
MadeChange = true;
}
for (unsigned i = 0; i != TypeVec.size(); ++i)
if (!isVector(TypeVec[i]))
TypeVec.erase(TypeVec.begin()+i--);
if (TypeVec.empty())
TP.error("Type inference contradiction found, '" +
InputSet.getName() + "' needs to be a vector");
return MadeChange;
}
bool EEVT::TypeSet::EnforceSmallerThan(EEVT::TypeSet &Other, TreePattern &TP) {
bool MadeChange = false;
assert(!(hasIntegerTypes() && hasFloatingPointTypes()) &&
!(Other.hasIntegerTypes() && Other.hasFloatingPointTypes()) &&
"SDTCisOpSmallerThanOp does not handle mixed int/fp types!");
if (hasIntegerTypes())
MadeChange |= Other.EnforceInteger(TP);
else if (hasFloatingPointTypes())
MadeChange |= Other.EnforceFloatingPoint(TP);
if (Other.hasIntegerTypes())
MadeChange |= EnforceInteger(TP);
else if (Other.hasFloatingPointTypes())
MadeChange |= EnforceFloatingPoint(TP);
assert(!isCompletelyUnknown() && !Other.isCompletelyUnknown() &&
"Should have a type list now");
if (!hasVectorTypes() && Other.hasVectorTypes())
MadeChange |= Other.EnforceScalar(TP);
if (hasVectorTypes() && !Other.hasVectorTypes())
MadeChange |= EnforceScalar(TP);
const CodeGenTarget &CGT = TP.getDAGPatterns().getTargetInfo();
TypeSet LegalVTs = CGT.getLegalValueTypes();
if (hasIntegerTypes())
LegalVTs.EnforceInteger(TP);
else if (hasFloatingPointTypes())
LegalVTs.EnforceFloatingPoint(TP);
else
return MadeChange;
switch (LegalVTs.TypeVec.size()) {
case 0: assert(0 && "No legal VTs?");
default: return MadeChange;
case 1:
return MergeInTypeInfo(MVT::Other, TP); case 2:
assert(LegalVTs.TypeVec[0] < LegalVTs.TypeVec[1] && "Should be sorted!");
MadeChange |= MergeInTypeInfo(LegalVTs.TypeVec[0], TP);
MadeChange |= Other.MergeInTypeInfo(LegalVTs.TypeVec[1], TP);
return MadeChange;
}
}
bool EEVT::TypeSet::EnforceVectorEltTypeIs(MVT::SimpleValueType VT,
TreePattern &TP) {
TypeSet InputSet(*this);
bool MadeChange = false;
if (TypeVec.empty()) {
*this = TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
MadeChange = true;
}
for (unsigned i = 0; i != TypeVec.size(); ++i)
if (!isVector(TypeVec[i]) ||
EVT(TypeVec[i]).getVectorElementType().getSimpleVT().SimpleTy != VT) {
TypeVec.erase(TypeVec.begin()+i--);
MadeChange = true;
}
if (TypeVec.empty()) TP.error("Type inference contradiction found, forcing '" +
InputSet.getName() + "' to have a vector element");
return MadeChange;
}
bool RecordPtrCmp::operator()(const Record *LHS, const Record *RHS) const {
return LHS->getID() < RHS->getID();
}
typedef std::map<std::string, int> DepVarMap;
typedef DepVarMap::const_iterator DepVarMap_citer;
namespace {
void FindDepVarsOf(TreePatternNode *N, DepVarMap &DepMap) {
if (N->isLeaf()) {
if (dynamic_cast<DefInit*>(N->getLeafValue()) != NULL) {
DepMap[N->getName()]++;
}
} else {
for (size_t i = 0, e = N->getNumChildren(); i != e; ++i)
FindDepVarsOf(N->getChild(i), DepMap);
}
}
void FindDepVars(TreePatternNode *N, MultipleUseVarSet &DepVars) {
DepVarMap depcounts;
FindDepVarsOf(N, depcounts);
for (DepVarMap_citer i = depcounts.begin(); i != depcounts.end(); ++i) {
if (i->second > 1) { DepVars.insert(i->first);
}
}
}
void DumpDepVars(MultipleUseVarSet &DepVars) {
if (DepVars.empty()) {
DEBUG(errs() << "<empty set>");
} else {
DEBUG(errs() << "[ ");
for (MultipleUseVarSet::const_iterator i = DepVars.begin(), e = DepVars.end();
i != e; ++i) {
DEBUG(errs() << (*i) << " ");
}
DEBUG(errs() << "]");
}
}
}
std::string PatternToMatch::getPredicateCheck() const {
std::string PredicateCheck;
for (unsigned i = 0, e = Predicates->getSize(); i != e; ++i) {
if (DefInit *Pred = dynamic_cast<DefInit*>(Predicates->getElement(i))) {
Record *Def = Pred->getDef();
if (!Def->isSubClassOf("Predicate")) {
#ifndef NDEBUG
Def->dump();
#endif
assert(0 && "Unknown predicate type!");
}
if (!PredicateCheck.empty())
PredicateCheck += " && ";
PredicateCheck += "(" + Def->getValueAsString("CondString") + ")";
}
}
return PredicateCheck;
}
SDTypeConstraint::SDTypeConstraint(Record *R) {
OperandNo = R->getValueAsInt("OperandNum");
if (R->isSubClassOf("SDTCisVT")) {
ConstraintType = SDTCisVT;
x.SDTCisVT_Info.VT = getValueType(R->getValueAsDef("VT"));
} else if (R->isSubClassOf("SDTCisPtrTy")) {
ConstraintType = SDTCisPtrTy;
} else if (R->isSubClassOf("SDTCisInt")) {
ConstraintType = SDTCisInt;
} else if (R->isSubClassOf("SDTCisFP")) {
ConstraintType = SDTCisFP;
} else if (R->isSubClassOf("SDTCisVec")) {
ConstraintType = SDTCisVec;
} else if (R->isSubClassOf("SDTCisSameAs")) {
ConstraintType = SDTCisSameAs;
x.SDTCisSameAs_Info.OtherOperandNum = R->getValueAsInt("OtherOperandNum");
} else if (R->isSubClassOf("SDTCisVTSmallerThanOp")) {
ConstraintType = SDTCisVTSmallerThanOp;
x.SDTCisVTSmallerThanOp_Info.OtherOperandNum =
R->getValueAsInt("OtherOperandNum");
} else if (R->isSubClassOf("SDTCisOpSmallerThanOp")) {
ConstraintType = SDTCisOpSmallerThanOp;
x.SDTCisOpSmallerThanOp_Info.BigOperandNum =
R->getValueAsInt("BigOperandNum");
} else if (R->isSubClassOf("SDTCisEltOfVec")) {
ConstraintType = SDTCisEltOfVec;
x.SDTCisEltOfVec_Info.OtherOperandNum = R->getValueAsInt("OtherOpNum");
} else {
errs() << "Unrecognized SDTypeConstraint '" << R->getName() << "'!\n";
exit(1);
}
}
TreePatternNode *SDTypeConstraint::getOperandNum(unsigned OpNo,
TreePatternNode *N,
unsigned NumResults) const {
assert(NumResults <= 1 &&
"We only work with nodes with zero or one result so far!");
if (OpNo >= (NumResults + N->getNumChildren())) {
errs() << "Invalid operand number " << OpNo << " ";
N->dump();
errs() << '\n';
exit(1);
}
if (OpNo < NumResults)
return N; else
return N->getChild(OpNo-NumResults);
}
bool SDTypeConstraint::ApplyTypeConstraint(TreePatternNode *N,
const SDNodeInfo &NodeInfo,
TreePattern &TP) const {
unsigned NumResults = NodeInfo.getNumResults();
assert(NumResults <= 1 &&
"We only work with nodes with zero or one result so far!");
if (NodeInfo.getNumOperands() >= 0) {
if (N->getNumChildren() != (unsigned)NodeInfo.getNumOperands())
TP.error(N->getOperator()->getName() + " node requires exactly " +
itostr(NodeInfo.getNumOperands()) + " operands!");
}
TreePatternNode *NodeToApply = getOperandNum(OperandNo, N, NumResults);
switch (ConstraintType) {
default: assert(0 && "Unknown constraint type!");
case SDTCisVT:
return NodeToApply->UpdateNodeType(x.SDTCisVT_Info.VT, TP);
case SDTCisPtrTy:
return NodeToApply->UpdateNodeType(MVT::iPTR, TP);
case SDTCisInt:
return NodeToApply->getExtType().EnforceInteger(TP);
case SDTCisFP:
return NodeToApply->getExtType().EnforceFloatingPoint(TP);
case SDTCisVec:
return NodeToApply->getExtType().EnforceVector(TP);
case SDTCisSameAs: {
TreePatternNode *OtherNode =
getOperandNum(x.SDTCisSameAs_Info.OtherOperandNum, N, NumResults);
return NodeToApply->UpdateNodeType(OtherNode->getExtType(), TP) |
OtherNode->UpdateNodeType(NodeToApply->getExtType(), TP);
}
case SDTCisVTSmallerThanOp: {
if (!NodeToApply->isLeaf() ||
!dynamic_cast<DefInit*>(NodeToApply->getLeafValue()) ||
!static_cast<DefInit*>(NodeToApply->getLeafValue())->getDef()
->isSubClassOf("ValueType"))
TP.error(N->getOperator()->getName() + " expects a VT operand!");
MVT::SimpleValueType VT =
getValueType(static_cast<DefInit*>(NodeToApply->getLeafValue())->getDef());
if (!isInteger(VT))
TP.error(N->getOperator()->getName() + " VT operand must be integer!");
TreePatternNode *OtherNode =
getOperandNum(x.SDTCisVTSmallerThanOp_Info.OtherOperandNum, N,NumResults);
bool MadeChange = OtherNode->getExtType().EnforceInteger(TP);
if (OtherNode->hasTypeSet() && OtherNode->getType() <= VT)
OtherNode->UpdateNodeType(MVT::Other, TP); return MadeChange;
}
case SDTCisOpSmallerThanOp: {
TreePatternNode *BigOperand =
getOperandNum(x.SDTCisOpSmallerThanOp_Info.BigOperandNum, N, NumResults);
return NodeToApply->getExtType().
EnforceSmallerThan(BigOperand->getExtType(), TP);
}
case SDTCisEltOfVec: {
TreePatternNode *VecOperand =
getOperandNum(x.SDTCisEltOfVec_Info.OtherOperandNum, N, NumResults);
if (VecOperand->hasTypeSet()) {
if (!isVector(VecOperand->getType()))
TP.error(N->getOperator()->getName() + " VT operand must be a vector!");
EVT IVT = VecOperand->getType();
IVT = IVT.getVectorElementType();
return NodeToApply->UpdateNodeType(IVT.getSimpleVT().SimpleTy, TP);
}
if (NodeToApply->hasTypeSet() && VecOperand->getExtType().hasVectorTypes()){
return VecOperand->getExtType().
EnforceVectorEltTypeIs(NodeToApply->getType(), TP);
}
return false;
}
}
return false;
}
SDNodeInfo::SDNodeInfo(Record *R) : Def(R) {
EnumName = R->getValueAsString("Opcode");
SDClassName = R->getValueAsString("SDClass");
Record *TypeProfile = R->getValueAsDef("TypeProfile");
NumResults = TypeProfile->getValueAsInt("NumResults");
NumOperands = TypeProfile->getValueAsInt("NumOperands");
Properties = 0;
std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
for (unsigned i = 0, e = PropList.size(); i != e; ++i) {
if (PropList[i]->getName() == "SDNPCommutative") {
Properties |= 1 << SDNPCommutative;
} else if (PropList[i]->getName() == "SDNPAssociative") {
Properties |= 1 << SDNPAssociative;
} else if (PropList[i]->getName() == "SDNPHasChain") {
Properties |= 1 << SDNPHasChain;
} else if (PropList[i]->getName() == "SDNPOutFlag") {
Properties |= 1 << SDNPOutFlag;
} else if (PropList[i]->getName() == "SDNPInFlag") {
Properties |= 1 << SDNPInFlag;
} else if (PropList[i]->getName() == "SDNPOptInFlag") {
Properties |= 1 << SDNPOptInFlag;
} else if (PropList[i]->getName() == "SDNPMayStore") {
Properties |= 1 << SDNPMayStore;
} else if (PropList[i]->getName() == "SDNPMayLoad") {
Properties |= 1 << SDNPMayLoad;
} else if (PropList[i]->getName() == "SDNPSideEffect") {
Properties |= 1 << SDNPSideEffect;
} else if (PropList[i]->getName() == "SDNPMemOperand") {
Properties |= 1 << SDNPMemOperand;
} else {
errs() << "Unknown SD Node property '" << PropList[i]->getName()
<< "' on node '" << R->getName() << "'!\n";
exit(1);
}
}
std::vector<Record*> ConstraintList =
TypeProfile->getValueAsListOfDefs("Constraints");
TypeConstraints.assign(ConstraintList.begin(), ConstraintList.end());
}
unsigned SDNodeInfo::getKnownType() const {
unsigned NumResults = getNumResults();
assert(NumResults <= 1 &&
"We only work with nodes with zero or one result so far!");
for (unsigned i = 0, e = TypeConstraints.size(); i != e; ++i) {
if (TypeConstraints[i].OperandNo >= NumResults) continue;
switch (TypeConstraints[i].ConstraintType) {
default: break;
case SDTypeConstraint::SDTCisVT:
return TypeConstraints[i].x.SDTCisVT_Info.VT;
case SDTypeConstraint::SDTCisPtrTy:
return MVT::iPTR;
}
}
return EEVT::isUnknown;
}
TreePatternNode::~TreePatternNode() {
#if 0 // FIXME: implement refcounted tree nodes!
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
delete getChild(i);
#endif
}
void TreePatternNode::print(raw_ostream &OS) const {
if (isLeaf()) {
OS << *getLeafValue();
} else {
OS << '(' << getOperator()->getName();
}
if (!isTypeCompletelyUnknown())
OS << ':' << getExtType().getName();
if (!isLeaf()) {
if (getNumChildren() != 0) {
OS << " ";
getChild(0)->print(OS);
for (unsigned i = 1, e = getNumChildren(); i != e; ++i) {
OS << ", ";
getChild(i)->print(OS);
}
}
OS << ")";
}
for (unsigned i = 0, e = PredicateFns.size(); i != e; ++i)
OS << "<<P:" << PredicateFns[i] << ">>";
if (TransformFn)
OS << "<<X:" << TransformFn->getName() << ">>";
if (!getName().empty())
OS << ":$" << getName();
}
void TreePatternNode::dump() const {
print(errs());
}
bool TreePatternNode::isIsomorphicTo(const TreePatternNode *N,
const MultipleUseVarSet &DepVars) const {
if (N == this) return true;
if (N->isLeaf() != isLeaf() || getExtType() != N->getExtType() ||
getPredicateFns() != N->getPredicateFns() ||
getTransformFn() != N->getTransformFn())
return false;
if (isLeaf()) {
if (DefInit *DI = dynamic_cast<DefInit*>(getLeafValue())) {
if (DefInit *NDI = dynamic_cast<DefInit*>(N->getLeafValue())) {
return ((DI->getDef() == NDI->getDef())
&& (DepVars.find(getName()) == DepVars.end()
|| getName() == N->getName()));
}
}
return getLeafValue() == N->getLeafValue();
}
if (N->getOperator() != getOperator() ||
N->getNumChildren() != getNumChildren()) return false;
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
if (!getChild(i)->isIsomorphicTo(N->getChild(i), DepVars))
return false;
return true;
}
TreePatternNode *TreePatternNode::clone() const {
TreePatternNode *New;
if (isLeaf()) {
New = new TreePatternNode(getLeafValue());
} else {
std::vector<TreePatternNode*> CChildren;
CChildren.reserve(Children.size());
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
CChildren.push_back(getChild(i)->clone());
New = new TreePatternNode(getOperator(), CChildren);
}
New->setName(getName());
New->setType(getExtType());
New->setPredicateFns(getPredicateFns());
New->setTransformFn(getTransformFn());
return New;
}
void TreePatternNode::RemoveAllTypes() {
setType(EEVT::TypeSet()); if (isLeaf()) return;
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
getChild(i)->RemoveAllTypes();
}
void TreePatternNode::
SubstituteFormalArguments(std::map<std::string, TreePatternNode*> &ArgMap) {
if (isLeaf()) return;
for (unsigned i = 0, e = getNumChildren(); i != e; ++i) {
TreePatternNode *Child = getChild(i);
if (Child->isLeaf()) {
Init *Val = Child->getLeafValue();
if (dynamic_cast<DefInit*>(Val) &&
static_cast<DefInit*>(Val)->getDef()->getName() == "node") {
TreePatternNode *NewChild = ArgMap[Child->getName()];
assert(NewChild && "Couldn't find formal argument!");
assert((Child->getPredicateFns().empty() ||
NewChild->getPredicateFns() == Child->getPredicateFns()) &&
"Non-empty child predicate clobbered!");
setChild(i, NewChild);
}
} else {
getChild(i)->SubstituteFormalArguments(ArgMap);
}
}
}
TreePatternNode *TreePatternNode::InlinePatternFragments(TreePattern &TP) {
if (isLeaf()) return this; Record *Op = getOperator();
if (!Op->isSubClassOf("PatFrag")) {
for (unsigned i = 0, e = getNumChildren(); i != e; ++i) {
TreePatternNode *Child = getChild(i);
TreePatternNode *NewChild = Child->InlinePatternFragments(TP);
assert((Child->getPredicateFns().empty() ||
NewChild->getPredicateFns() == Child->getPredicateFns()) &&
"Non-empty child predicate clobbered!");
setChild(i, NewChild);
}
return this;
}
TreePattern *Frag = TP.getDAGPatterns().getPatternFragment(Op);
if (Frag->getNumArgs() != Children.size())
TP.error("'" + Op->getName() + "' fragment requires " +
utostr(Frag->getNumArgs()) + " operands!");
TreePatternNode *FragTree = Frag->getOnlyTree()->clone();
std::string Code = Op->getValueAsCode("Predicate");
if (!Code.empty())
FragTree->addPredicateFn("Predicate_"+Op->getName());
if (Frag->getNumArgs()) {
std::map<std::string, TreePatternNode*> ArgMap;
for (unsigned i = 0, e = Frag->getNumArgs(); i != e; ++i)
ArgMap[Frag->getArgName(i)] = getChild(i)->InlinePatternFragments(TP);
FragTree->SubstituteFormalArguments(ArgMap);
}
FragTree->setName(getName());
FragTree->UpdateNodeType(getExtType(), TP);
for (unsigned i = 0, e = getPredicateFns().size(); i != e; ++i)
FragTree->addPredicateFn(getPredicateFns()[i]);
return FragTree->InlinePatternFragments(TP);
}
static EEVT::TypeSet getImplicitType(Record *R, bool NotRegisters,
TreePattern &TP) {
if (R->isSubClassOf("RegisterClass")) {
if (NotRegisters)
return EEVT::TypeSet(); const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
return EEVT::TypeSet(T.getRegisterClass(R).getValueTypes());
} else if (R->isSubClassOf("PatFrag")) {
return EEVT::TypeSet(); } else if (R->isSubClassOf("Register")) {
if (NotRegisters)
return EEVT::TypeSet(); const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
return EEVT::TypeSet(T.getRegisterVTs(R));
} else if (R->isSubClassOf("ValueType") || R->isSubClassOf("CondCode")) {
return EEVT::TypeSet(MVT::Other, TP);
} else if (R->isSubClassOf("ComplexPattern")) {
if (NotRegisters)
return EEVT::TypeSet(); return EEVT::TypeSet(TP.getDAGPatterns().getComplexPattern(R).getValueType(),
TP);
} else if (R->isSubClassOf("PointerLikeRegClass")) {
return EEVT::TypeSet(MVT::iPTR, TP);
} else if (R->getName() == "node" || R->getName() == "srcvalue" ||
R->getName() == "zero_reg") {
return EEVT::TypeSet(); }
TP.error("Unknown node flavor used in pattern: " + R->getName());
return EEVT::TypeSet(MVT::Other, TP);
}
const CodeGenIntrinsic *TreePatternNode::
getIntrinsicInfo(const CodeGenDAGPatterns &CDP) const {
if (getOperator() != CDP.get_intrinsic_void_sdnode() &&
getOperator() != CDP.get_intrinsic_w_chain_sdnode() &&
getOperator() != CDP.get_intrinsic_wo_chain_sdnode())
return 0;
unsigned IID =
dynamic_cast<IntInit*>(getChild(0)->getLeafValue())->getValue();
return &CDP.getIntrinsicInfo(IID);
}
const ComplexPattern *
TreePatternNode::getComplexPatternInfo(const CodeGenDAGPatterns &CGP) const {
if (!isLeaf()) return 0;
DefInit *DI = dynamic_cast<DefInit*>(getLeafValue());
if (DI && DI->getDef()->isSubClassOf("ComplexPattern"))
return &CGP.getComplexPattern(DI->getDef());
return 0;
}
bool TreePatternNode::NodeHasProperty(SDNP Property,
const CodeGenDAGPatterns &CGP) const {
if (isLeaf()) {
if (const ComplexPattern *CP = getComplexPatternInfo(CGP))
return CP->hasProperty(Property);
return false;
}
Record *Operator = getOperator();
if (!Operator->isSubClassOf("SDNode")) return false;
return CGP.getSDNodeInfo(Operator).hasProperty(Property);
}
bool TreePatternNode::TreeHasProperty(SDNP Property,
const CodeGenDAGPatterns &CGP) const {
if (NodeHasProperty(Property, CGP))
return true;
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
if (getChild(i)->TreeHasProperty(Property, CGP))
return true;
return false;
}
bool
TreePatternNode::isCommutativeIntrinsic(const CodeGenDAGPatterns &CDP) const {
if (const CodeGenIntrinsic *Int = getIntrinsicInfo(CDP))
return Int->isCommutative;
return false;
}
bool TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
CodeGenDAGPatterns &CDP = TP.getDAGPatterns();
if (isLeaf()) {
if (DefInit *DI = dynamic_cast<DefInit*>(getLeafValue())) {
return UpdateNodeType(getImplicitType(DI->getDef(), NotRegisters, TP),TP);
}
if (IntInit *II = dynamic_cast<IntInit*>(getLeafValue())) {
bool MadeChange = Type.EnforceInteger(TP);
if (!hasTypeSet())
return MadeChange;
MVT::SimpleValueType VT = getType();
if (VT == MVT::iPTR || VT == MVT::iPTRAny)
return MadeChange;
unsigned Size = EVT(VT).getSizeInBits();
if (Size >= 32) return MadeChange;
int Val = (II->getValue() << (32-Size)) >> (32-Size);
if (Val == II->getValue()) return MadeChange;
unsigned ValueMask;
unsigned UnsignedVal;
ValueMask = unsigned(~uint32_t(0UL) >> (32-Size));
UnsignedVal = unsigned(II->getValue());
if ((ValueMask & UnsignedVal) == UnsignedVal)
return MadeChange;
TP.error("Integer value '" + itostr(II->getValue())+
"' is out of range for type '" + getEnumName(getType()) + "'!");
return MadeChange;
}
return false;
}
if (getOperator()->getName() == "set") {
assert (getNumChildren() >= 2 && "Missing RHS of a set?");
unsigned NC = getNumChildren();
bool MadeChange = false;
for (unsigned i = 0; i < NC-1; ++i) {
MadeChange = getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
MadeChange |= getChild(NC-1)->ApplyTypeConstraints(TP, NotRegisters);
MadeChange |=getChild(i)->UpdateNodeType(getChild(NC-1)->getExtType(),TP);
MadeChange |=getChild(NC-1)->UpdateNodeType(getChild(i)->getExtType(),TP);
MadeChange |=UpdateNodeType(MVT::isVoid, TP);
}
return MadeChange;
}
if (getOperator()->getName() == "implicit" ||
getOperator()->getName() == "parallel") {
bool MadeChange = false;
for (unsigned i = 0; i < getNumChildren(); ++i)
MadeChange = getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
MadeChange |= UpdateNodeType(MVT::isVoid, TP);
return MadeChange;
}
if (getOperator()->getName() == "COPY_TO_REGCLASS") {
bool MadeChange = false;
MadeChange |= getChild(0)->ApplyTypeConstraints(TP, NotRegisters);
MadeChange |= getChild(1)->ApplyTypeConstraints(TP, NotRegisters);
if (!getChild(1)->hasTypeSet() &&
!getChild(1)->getExtType().isCompletelyUnknown()) {
MVT::SimpleValueType RCVT = getChild(1)->getExtType().getTypeList()[0];
MadeChange |= getChild(1)->UpdateNodeType(RCVT, TP);
}
return MadeChange;
}
if (const CodeGenIntrinsic *Int = getIntrinsicInfo(CDP)) {
bool MadeChange = false;
unsigned NumRetVTs = Int->IS.RetVTs.size();
unsigned NumParamVTs = Int->IS.ParamVTs.size();
for (unsigned i = 0, e = NumRetVTs; i != e; ++i)
MadeChange |= UpdateNodeType(Int->IS.RetVTs[i], TP);
if (getNumChildren() != NumParamVTs + NumRetVTs)
TP.error("Intrinsic '" + Int->Name + "' expects " +
utostr(NumParamVTs + NumRetVTs - 1) + " operands, not " +
utostr(getNumChildren() - 1) + " operands!");
MadeChange |= getChild(0)->UpdateNodeType(MVT::iPTR, TP);
for (unsigned i = NumRetVTs, e = getNumChildren(); i != e; ++i) {
MVT::SimpleValueType OpVT = Int->IS.ParamVTs[i - NumRetVTs];
MadeChange |= getChild(i)->UpdateNodeType(OpVT, TP);
MadeChange |= getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
}
return MadeChange;
}
if (getOperator()->isSubClassOf("SDNode")) {
const SDNodeInfo &NI = CDP.getSDNodeInfo(getOperator());
bool MadeChange = NI.ApplyTypeConstraints(this, TP);
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
MadeChange |= getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
if (NI.getNumResults() == 0)
MadeChange |= UpdateNodeType(MVT::isVoid, TP);
return MadeChange;
}
if (getOperator()->isSubClassOf("Instruction")) {
const DAGInstruction &Inst = CDP.getInstruction(getOperator());
bool MadeChange = false;
unsigned NumResults = Inst.getNumResults();
assert(NumResults <= 1 &&
"Only supports zero or one result instrs!");
CodeGenInstruction &InstInfo =
CDP.getTargetInfo().getInstruction(getOperator()->getName());
if (NumResults == 0 || InstInfo.NumDefs == 0) {
MadeChange = UpdateNodeType(MVT::isVoid, TP);
} else {
Record *ResultNode = Inst.getResult(0);
if (ResultNode->isSubClassOf("PointerLikeRegClass")) {
MadeChange = UpdateNodeType(MVT::iPTR, TP);
} else if (ResultNode->getName() == "unknown") {
} else {
assert(ResultNode->isSubClassOf("RegisterClass") &&
"Operands should be register classes!");
const CodeGenRegisterClass &RC =
CDP.getTargetInfo().getRegisterClass(ResultNode);
MadeChange = UpdateNodeType(RC.getValueTypes(), TP);
}
}
if (getOperator()->getName() == "INSERT_SUBREG") {
MadeChange |= UpdateNodeType(getChild(0)->getExtType(), TP);
MadeChange |= getChild(0)->UpdateNodeType(getExtType(), TP);
}
unsigned ChildNo = 0;
for (unsigned i = 0, e = Inst.getNumOperands(); i != e; ++i) {
Record *OperandNode = Inst.getOperand(i);
if ((OperandNode->isSubClassOf("PredicateOperand") ||
OperandNode->isSubClassOf("OptionalDefOperand")) &&
!CDP.getDefaultOperand(OperandNode).DefaultOps.empty())
continue;
if (ChildNo >= getNumChildren())
TP.error("Instruction '" + getOperator()->getName() +
"' expects more operands than were provided.");
MVT::SimpleValueType VT;
TreePatternNode *Child = getChild(ChildNo++);
if (OperandNode->isSubClassOf("RegisterClass")) {
const CodeGenRegisterClass &RC =
CDP.getTargetInfo().getRegisterClass(OperandNode);
MadeChange |= Child->UpdateNodeType(RC.getValueTypes(), TP);
} else if (OperandNode->isSubClassOf("Operand")) {
VT = getValueType(OperandNode->getValueAsDef("Type"));
MadeChange |= Child->UpdateNodeType(VT, TP);
} else if (OperandNode->isSubClassOf("PointerLikeRegClass")) {
MadeChange |= Child->UpdateNodeType(MVT::iPTR, TP);
} else if (OperandNode->getName() == "unknown") {
} else {
assert(0 && "Unknown operand type!");
abort();
}
MadeChange |= Child->ApplyTypeConstraints(TP, NotRegisters);
}
if (ChildNo != getNumChildren())
TP.error("Instruction '" + getOperator()->getName() +
"' was provided too many operands!");
return MadeChange;
}
assert(getOperator()->isSubClassOf("SDNodeXForm") && "Unknown node type!");
if (getNumChildren() != 1)
TP.error("Node transform '" + getOperator()->getName() +
"' requires one operand!");
bool MadeChange = getChild(0)->ApplyTypeConstraints(TP, NotRegisters);
#if 0
if (!hasTypeSet() || !getChild(0)->hasTypeSet()) {
bool MadeChange = UpdateNodeType(getChild(0)->getExtType(), TP);
MadeChange |= getChild(0)->UpdateNodeType(getExtType(), TP);
return MadeChange;
}
#endif
return MadeChange;
}
static bool OnlyOnRHSOfCommutative(TreePatternNode *N) {
if (!N->isLeaf() && N->getOperator()->getName() == "imm")
return true;
if (N->isLeaf() && dynamic_cast<IntInit*>(N->getLeafValue()))
return true;
return false;
}
bool TreePatternNode::canPatternMatch(std::string &Reason,
const CodeGenDAGPatterns &CDP) {
if (isLeaf()) return true;
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
if (!getChild(i)->canPatternMatch(Reason, CDP))
return false;
if (getOperator()->isSubClassOf("Intrinsic")) {
return true;
}
const SDNodeInfo &NodeInfo = CDP.getSDNodeInfo(getOperator());
bool isCommIntrinsic = isCommutativeIntrinsic(CDP);
if (NodeInfo.hasProperty(SDNPCommutative) || isCommIntrinsic) {
if (!OnlyOnRHSOfCommutative(getChild(getNumChildren()-1))) {
bool Skip = isCommIntrinsic ? 1 : 0; for (unsigned i = Skip, e = getNumChildren()-1; i != e; ++i)
if (OnlyOnRHSOfCommutative(getChild(i))) {
Reason="Immediate value must be on the RHS of commutative operators!";
return false;
}
}
}
return true;
}
TreePattern::TreePattern(Record *TheRec, ListInit *RawPat, bool isInput,
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
isInputPattern = isInput;
for (unsigned i = 0, e = RawPat->getSize(); i != e; ++i)
Trees.push_back(ParseTreePattern((DagInit*)RawPat->getElement(i)));
}
TreePattern::TreePattern(Record *TheRec, DagInit *Pat, bool isInput,
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
isInputPattern = isInput;
Trees.push_back(ParseTreePattern(Pat));
}
TreePattern::TreePattern(Record *TheRec, TreePatternNode *Pat, bool isInput,
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
isInputPattern = isInput;
Trees.push_back(Pat);
}
void TreePattern::error(const std::string &Msg) const {
dump();
throw TGError(TheRecord->getLoc(), "In " + TheRecord->getName() + ": " + Msg);
}
void TreePattern::ComputeNamedNodes() {
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
ComputeNamedNodes(Trees[i]);
}
void TreePattern::ComputeNamedNodes(TreePatternNode *N) {
if (!N->getName().empty())
NamedNodes[N->getName()].push_back(N);
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
ComputeNamedNodes(N->getChild(i));
}
TreePatternNode *TreePattern::ParseTreePattern(DagInit *Dag) {
DefInit *OpDef = dynamic_cast<DefInit*>(Dag->getOperator());
if (!OpDef) error("Pattern has unexpected operator type!");
Record *Operator = OpDef->getDef();
if (Operator->isSubClassOf("ValueType")) {
if (Dag->getNumArgs() != 1)
error("Type cast only takes one operand!");
Init *Arg = Dag->getArg(0);
TreePatternNode *New;
if (DefInit *DI = dynamic_cast<DefInit*>(Arg)) {
Record *R = DI->getDef();
if (R->isSubClassOf("SDNode") || R->isSubClassOf("PatFrag")) {
Dag->setArg(0, new DagInit(DI, "",
std::vector<std::pair<Init*, std::string> >()));
return ParseTreePattern(Dag);
}
if (R->getName() == "node") {
if (Dag->getArgName(0).empty())
error("'node' argument requires a name to match with operand list");
Args.push_back(Dag->getArgName(0));
}
New = new TreePatternNode(DI);
} else if (DagInit *DI = dynamic_cast<DagInit*>(Arg)) {
New = ParseTreePattern(DI);
} else if (IntInit *II = dynamic_cast<IntInit*>(Arg)) {
New = new TreePatternNode(II);
if (!Dag->getArgName(0).empty())
error("Constant int argument should not have a name!");
} else if (BitsInit *BI = dynamic_cast<BitsInit*>(Arg)) {
Init *II = BI->convertInitializerTo(new IntRecTy());
if (II == 0 || !dynamic_cast<IntInit*>(II))
error("Bits value must be constants!");
New = new TreePatternNode(dynamic_cast<IntInit*>(II));
if (!Dag->getArgName(0).empty())
error("Constant int argument should not have a name!");
} else {
Arg->dump();
error("Unknown leaf value for tree pattern!");
return 0;
}
New->UpdateNodeType(getValueType(Operator), *this);
if (New->getNumChildren() == 0)
New->setName(Dag->getArgName(0));
return New;
}
if (!Operator->isSubClassOf("PatFrag") &&
!Operator->isSubClassOf("SDNode") &&
!Operator->isSubClassOf("Instruction") &&
!Operator->isSubClassOf("SDNodeXForm") &&
!Operator->isSubClassOf("Intrinsic") &&
Operator->getName() != "set" &&
Operator->getName() != "implicit" &&
Operator->getName() != "parallel")
error("Unrecognized node '" + Operator->getName() + "'!");
if (isInputPattern && (Operator->isSubClassOf("Instruction") ||
Operator->isSubClassOf("SDNodeXForm")))
error("Cannot use '" + Operator->getName() + "' in an input pattern!");
std::vector<TreePatternNode*> Children;
for (unsigned i = 0, e = Dag->getNumArgs(); i != e; ++i) {
Init *Arg = Dag->getArg(i);
if (DagInit *DI = dynamic_cast<DagInit*>(Arg)) {
Children.push_back(ParseTreePattern(DI));
if (Children.back()->getName().empty())
Children.back()->setName(Dag->getArgName(i));
} else if (DefInit *DefI = dynamic_cast<DefInit*>(Arg)) {
Record *R = DefI->getDef();
if (R->isSubClassOf("SDNode") || R->isSubClassOf("PatFrag")) {
Dag->setArg(i, new DagInit(DefI, "",
std::vector<std::pair<Init*, std::string> >()));
--i; } else {
TreePatternNode *Node = new TreePatternNode(DefI);
Node->setName(Dag->getArgName(i));
Children.push_back(Node);
if (R->getName() == "node") {
if (Dag->getArgName(i).empty())
error("'node' argument requires a name to match with operand list");
Args.push_back(Dag->getArgName(i));
}
}
} else if (IntInit *II = dynamic_cast<IntInit*>(Arg)) {
TreePatternNode *Node = new TreePatternNode(II);
if (!Dag->getArgName(i).empty())
error("Constant int argument should not have a name!");
Children.push_back(Node);
} else if (BitsInit *BI = dynamic_cast<BitsInit*>(Arg)) {
Init *II = BI->convertInitializerTo(new IntRecTy());
if (II == 0 || !dynamic_cast<IntInit*>(II))
error("Bits value must be constants!");
TreePatternNode *Node = new TreePatternNode(dynamic_cast<IntInit*>(II));
if (!Dag->getArgName(i).empty())
error("Constant int argument should not have a name!");
Children.push_back(Node);
} else {
errs() << '"';
Arg->dump();
errs() << "\": ";
error("Unknown leaf value for tree pattern!");
}
}
if (Operator->isSubClassOf("Intrinsic")) {
const CodeGenIntrinsic &Int = getDAGPatterns().getIntrinsic(Operator);
unsigned IID = getDAGPatterns().getIntrinsicID(Operator)+1;
if (Int.IS.RetVTs[0] == MVT::isVoid) {
Operator = getDAGPatterns().get_intrinsic_void_sdnode();
} else if (Int.ModRef != CodeGenIntrinsic::NoMem) {
Operator = getDAGPatterns().get_intrinsic_w_chain_sdnode();
} else {
Operator = getDAGPatterns().get_intrinsic_wo_chain_sdnode();
}
TreePatternNode *IIDNode = new TreePatternNode(new IntInit(IID));
Children.insert(Children.begin(), IIDNode);
}
TreePatternNode *Result = new TreePatternNode(Operator, Children);
Result->setName(Dag->getName());
return Result;
}
bool TreePattern::
InferAllTypes(const StringMap<SmallVector<TreePatternNode*,1> > *InNamedTypes) {
if (NamedNodes.empty())
ComputeNamedNodes();
bool MadeChange = true;
while (MadeChange) {
MadeChange = false;
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
MadeChange |= Trees[i]->ApplyTypeConstraints(*this, false);
for (StringMap<SmallVector<TreePatternNode*,1> >::iterator
I = NamedNodes.begin(), E = NamedNodes.end(); I != E; ++I) {
SmallVectorImpl<TreePatternNode*> &Nodes = I->second;
if (InNamedTypes) {
assert(InNamedTypes->count(I->getKey()) &&
"Named node in output pattern but not input pattern?");
const SmallVectorImpl<TreePatternNode*> &InNodes =
InNamedTypes->find(I->getKey())->second;
for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
if (Nodes[i] == Trees[0] && Nodes[i]->isLeaf()) {
DefInit *DI = dynamic_cast<DefInit*>(Nodes[i]->getLeafValue());
if (DI && DI->getDef()->isSubClassOf("RegisterClass"))
continue;
}
MadeChange |=Nodes[i]->UpdateNodeType(InNodes[0]->getExtType(),*this);
}
}
if (I->second.size() > 1) {
for (unsigned i = 0, e = Nodes.size()-1; i != e; ++i) {
MadeChange |=Nodes[i]->UpdateNodeType(Nodes[i+1]->getExtType(),*this);
MadeChange |=Nodes[i+1]->UpdateNodeType(Nodes[i]->getExtType(),*this);
}
}
}
}
bool HasUnresolvedTypes = false;
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
HasUnresolvedTypes |= Trees[i]->ContainsUnresolvedType();
return !HasUnresolvedTypes;
}
void TreePattern::print(raw_ostream &OS) const {
OS << getRecord()->getName();
if (!Args.empty()) {
OS << "(" << Args[0];
for (unsigned i = 1, e = Args.size(); i != e; ++i)
OS << ", " << Args[i];
OS << ")";
}
OS << ": ";
if (Trees.size() > 1)
OS << "[\n";
for (unsigned i = 0, e = Trees.size(); i != e; ++i) {
OS << "\t";
Trees[i]->print(OS);
OS << "\n";
}
if (Trees.size() > 1)
OS << "]\n";
}
void TreePattern::dump() const { print(errs()); }
CodeGenDAGPatterns::CodeGenDAGPatterns(RecordKeeper &R) : Records(R) {
Intrinsics = LoadIntrinsics(Records, false);
TgtIntrinsics = LoadIntrinsics(Records, true);
ParseNodeInfo();
ParseNodeTransforms();
ParseComplexPatterns();
ParsePatternFragments();
ParseDefaultOperands();
ParseInstructions();
ParsePatterns();
GenerateVariants();
InferInstructionFlags();
}
CodeGenDAGPatterns::~CodeGenDAGPatterns() {
for (pf_iterator I = PatternFragments.begin(),
E = PatternFragments.end(); I != E; ++I)
delete I->second;
}
Record *CodeGenDAGPatterns::getSDNodeNamed(const std::string &Name) const {
Record *N = Records.getDef(Name);
if (!N || !N->isSubClassOf("SDNode")) {
errs() << "Error getting SDNode '" << Name << "'!\n";
exit(1);
}
return N;
}
void CodeGenDAGPatterns::ParseNodeInfo() {
std::vector<Record*> Nodes = Records.getAllDerivedDefinitions("SDNode");
while (!Nodes.empty()) {
SDNodes.insert(std::make_pair(Nodes.back(), Nodes.back()));
Nodes.pop_back();
}
intrinsic_void_sdnode = getSDNodeNamed("intrinsic_void");
intrinsic_w_chain_sdnode = getSDNodeNamed("intrinsic_w_chain");
intrinsic_wo_chain_sdnode = getSDNodeNamed("intrinsic_wo_chain");
}
void CodeGenDAGPatterns::ParseNodeTransforms() {
std::vector<Record*> Xforms = Records.getAllDerivedDefinitions("SDNodeXForm");
while (!Xforms.empty()) {
Record *XFormNode = Xforms.back();
Record *SDNode = XFormNode->getValueAsDef("Opcode");
std::string Code = XFormNode->getValueAsCode("XFormFunction");
SDNodeXForms.insert(std::make_pair(XFormNode, NodeXForm(SDNode, Code)));
Xforms.pop_back();
}
}
void CodeGenDAGPatterns::ParseComplexPatterns() {
std::vector<Record*> AMs = Records.getAllDerivedDefinitions("ComplexPattern");
while (!AMs.empty()) {
ComplexPatterns.insert(std::make_pair(AMs.back(), AMs.back()));
AMs.pop_back();
}
}
void CodeGenDAGPatterns::ParsePatternFragments() {
std::vector<Record*> Fragments = Records.getAllDerivedDefinitions("PatFrag");
for (unsigned i = 0, e = Fragments.size(); i != e; ++i) {
DagInit *Tree = Fragments[i]->getValueAsDag("Fragment");
TreePattern *P = new TreePattern(Fragments[i], Tree, true, *this);
PatternFragments[Fragments[i]] = P;
std::vector<std::string> &Args = P->getArgList();
std::set<std::string> OperandsSet(Args.begin(), Args.end());
if (OperandsSet.count(""))
P->error("Cannot have unnamed 'node' values in pattern fragment!");
DagInit *OpsList = Fragments[i]->getValueAsDag("Operands");
DefInit *OpsOp = dynamic_cast<DefInit*>(OpsList->getOperator());
if (!OpsOp ||
(OpsOp->getDef()->getName() != "ops" &&
OpsOp->getDef()->getName() != "outs" &&
OpsOp->getDef()->getName() != "ins"))
P->error("Operands list should start with '(ops ... '!");
Args.clear();
for (unsigned j = 0, e = OpsList->getNumArgs(); j != e; ++j) {
if (!dynamic_cast<DefInit*>(OpsList->getArg(j)) ||
static_cast<DefInit*>(OpsList->getArg(j))->
getDef()->getName() != "node")
P->error("Operands list should all be 'node' values.");
if (OpsList->getArgName(j).empty())
P->error("Operands list should have names for each operand!");
if (!OperandsSet.count(OpsList->getArgName(j)))
P->error("'" + OpsList->getArgName(j) +
"' does not occur in pattern or was multiply specified!");
OperandsSet.erase(OpsList->getArgName(j));
Args.push_back(OpsList->getArgName(j));
}
if (!OperandsSet.empty())
P->error("Operands list does not contain an entry for operand '" +
*OperandsSet.begin() + "'!");
std::string Code = Fragments[i]->getValueAsCode("Predicate");
if (!Code.empty())
P->getOnlyTree()->addPredicateFn("Predicate_"+Fragments[i]->getName());
Record *Transform = Fragments[i]->getValueAsDef("OperandTransform");
if (!getSDNodeTransform(Transform).second.empty()) P->getOnlyTree()->setTransformFn(Transform);
}
for (unsigned i = 0, e = Fragments.size(); i != e; ++i) {
TreePattern *ThePat = PatternFragments[Fragments[i]];
ThePat->InlinePatternFragments();
try {
ThePat->InferAllTypes();
} catch (...) {
}
DEBUG(ThePat->dump());
}
}
void CodeGenDAGPatterns::ParseDefaultOperands() {
std::vector<Record*> DefaultOps[2];
DefaultOps[0] = Records.getAllDerivedDefinitions("PredicateOperand");
DefaultOps[1] = Records.getAllDerivedDefinitions("OptionalDefOperand");
assert(!SDNodes.empty() && "No SDNodes parsed?");
Init *SomeSDNode = new DefInit(SDNodes.begin()->first);
for (unsigned iter = 0; iter != 2; ++iter) {
for (unsigned i = 0, e = DefaultOps[iter].size(); i != e; ++i) {
DagInit *DefaultInfo = DefaultOps[iter][i]->getValueAsDag("DefaultOps");
std::vector<std::pair<Init*, std::string> > Ops;
for (unsigned op = 0, e = DefaultInfo->getNumArgs(); op != e; ++op)
Ops.push_back(std::make_pair(DefaultInfo->getArg(op),
DefaultInfo->getArgName(op)));
DagInit *DI = new DagInit(SomeSDNode, "", Ops);
TreePattern P(DefaultOps[iter][i], DI, false, *this);
assert(P.getNumTrees() == 1 && "This ctor can only produce one tree!");
DAGDefaultOperand DefaultOpInfo;
TreePatternNode *T = P.getTree(0);
for (unsigned op = 0, e = T->getNumChildren(); op != e; ++op) {
TreePatternNode *TPN = T->getChild(op);
while (TPN->ApplyTypeConstraints(P, false))
;
if (TPN->ContainsUnresolvedType()) {
if (iter == 0)
throw "Value #" + utostr(i) + " of PredicateOperand '" +
DefaultOps[iter][i]->getName() +"' doesn't have a concrete type!";
else
throw "Value #" + utostr(i) + " of OptionalDefOperand '" +
DefaultOps[iter][i]->getName() +"' doesn't have a concrete type!";
}
DefaultOpInfo.DefaultOps.push_back(TPN);
}
DefaultOperands[DefaultOps[iter][i]] = DefaultOpInfo;
}
}
}
static bool HandleUse(TreePattern *I, TreePatternNode *Pat,
std::map<std::string, TreePatternNode*> &InstInputs,
std::vector<Record*> &InstImpInputs) {
if (Pat->getName().empty()) {
if (Pat->isLeaf()) {
DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
if (DI && DI->getDef()->isSubClassOf("RegisterClass"))
I->error("Input " + DI->getDef()->getName() + " must be named!");
else if (DI && DI->getDef()->isSubClassOf("Register"))
InstImpInputs.push_back(DI->getDef());
}
return false;
}
Record *Rec;
if (Pat->isLeaf()) {
DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
if (!DI) I->error("Input $" + Pat->getName() + " must be an identifier!");
Rec = DI->getDef();
} else {
Rec = Pat->getOperator();
}
if (Rec->getName() == "srcvalue")
return false;
TreePatternNode *&Slot = InstInputs[Pat->getName()];
if (!Slot) {
Slot = Pat;
return true;
}
Record *SlotRec;
if (Slot->isLeaf()) {
SlotRec = dynamic_cast<DefInit*>(Slot->getLeafValue())->getDef();
} else {
assert(Slot->getNumChildren() == 0 && "can't be a use with children!");
SlotRec = Slot->getOperator();
}
if (Rec != SlotRec)
I->error("All $" + Pat->getName() + " inputs must agree with each other");
if (Slot->getExtType() != Pat->getExtType())
I->error("All $" + Pat->getName() + " inputs must agree with each other");
return true;
}
void CodeGenDAGPatterns::
FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
std::map<std::string, TreePatternNode*> &InstInputs,
std::map<std::string, TreePatternNode*>&InstResults,
std::vector<Record*> &InstImpInputs,
std::vector<Record*> &InstImpResults) {
if (Pat->isLeaf()) {
bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
if (!isUse && Pat->getTransformFn())
I->error("Cannot specify a transform function for a non-input value!");
return;
}
if (Pat->getOperator()->getName() == "implicit") {
for (unsigned i = 0, e = Pat->getNumChildren(); i != e; ++i) {
TreePatternNode *Dest = Pat->getChild(i);
if (!Dest->isLeaf())
I->error("implicitly defined value should be a register!");
DefInit *Val = dynamic_cast<DefInit*>(Dest->getLeafValue());
if (!Val || !Val->getDef()->isSubClassOf("Register"))
I->error("implicitly defined value should be a register!");
InstImpResults.push_back(Val->getDef());
}
return;
}
if (Pat->getOperator()->getName() != "set") {
for (unsigned i = 0, e = Pat->getNumChildren(); i != e; ++i) {
if (Pat->getChild(i)->getType() == MVT::isVoid)
I->error("Cannot have void nodes inside of patterns!");
FindPatternInputsAndOutputs(I, Pat->getChild(i), InstInputs, InstResults,
InstImpInputs, InstImpResults);
}
bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
if (!isUse && Pat->getTransformFn())
I->error("Cannot specify a transform function for a non-input value!");
return;
}
if (Pat->getNumChildren() == 0)
I->error("set requires operands!");
if (Pat->getTransformFn())
I->error("Cannot specify a transform function on a set node!");
unsigned NumDests = Pat->getNumChildren()-1;
for (unsigned i = 0; i != NumDests; ++i) {
TreePatternNode *Dest = Pat->getChild(i);
if (!Dest->isLeaf())
I->error("set destination should be a register!");
DefInit *Val = dynamic_cast<DefInit*>(Dest->getLeafValue());
if (!Val)
I->error("set destination should be a register!");
if (Val->getDef()->isSubClassOf("RegisterClass") ||
Val->getDef()->isSubClassOf("PointerLikeRegClass")) {
if (Dest->getName().empty())
I->error("set destination must have a name!");
if (InstResults.count(Dest->getName()))
I->error("cannot set '" + Dest->getName() +"' multiple times");
InstResults[Dest->getName()] = Dest;
} else if (Val->getDef()->isSubClassOf("Register")) {
InstImpResults.push_back(Val->getDef());
} else {
I->error("set destination should be a register!");
}
}
FindPatternInputsAndOutputs(I, Pat->getChild(NumDests),
InstInputs, InstResults,
InstImpInputs, InstImpResults);
}
class InstAnalyzer {
const CodeGenDAGPatterns &CDP;
bool &mayStore;
bool &mayLoad;
bool &HasSideEffects;
public:
InstAnalyzer(const CodeGenDAGPatterns &cdp,
bool &maystore, bool &mayload, bool &hse)
: CDP(cdp), mayStore(maystore), mayLoad(mayload), HasSideEffects(hse){
}
bool Analyze(Record *InstRecord) {
const TreePattern *Pattern = CDP.getInstruction(InstRecord).getPattern();
if (Pattern == 0) {
HasSideEffects = 1;
return false; }
AnalyzeNode(Pattern->getTree(0));
return true;
}
private:
void AnalyzeNode(const TreePatternNode *N) {
if (N->isLeaf()) {
if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
Record *LeafRec = DI->getDef();
if (LeafRec->isSubClassOf("ComplexPattern")) {
const ComplexPattern &CP = CDP.getComplexPattern(LeafRec);
if (CP.hasProperty(SDNPMayStore)) mayStore = true;
if (CP.hasProperty(SDNPMayLoad)) mayLoad = true;
if (CP.hasProperty(SDNPSideEffect)) HasSideEffects = true;
}
}
return;
}
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
AnalyzeNode(N->getChild(i));
if (N->getOperator()->getName() == "set")
return;
const SDNodeInfo &OpInfo = CDP.getSDNodeInfo(N->getOperator());
if (OpInfo.hasProperty(SDNPMayStore)) mayStore = true;
if (OpInfo.hasProperty(SDNPMayLoad)) mayLoad = true;
if (OpInfo.hasProperty(SDNPSideEffect)) HasSideEffects = true;
if (const CodeGenIntrinsic *IntInfo = N->getIntrinsicInfo(CDP)) {
if (IntInfo->ModRef >= CodeGenIntrinsic::ReadArgMem)
mayLoad = true;
if (IntInfo->ModRef >= CodeGenIntrinsic::WriteArgMem)
mayStore = true;
if (IntInfo->ModRef >= CodeGenIntrinsic::WriteMem)
HasSideEffects = true;
}
}
};
static void InferFromPattern(const CodeGenInstruction &Inst,
bool &MayStore, bool &MayLoad,
bool &HasSideEffects,
const CodeGenDAGPatterns &CDP) {
MayStore = MayLoad = HasSideEffects = false;
bool HadPattern =
InstAnalyzer(CDP, MayStore, MayLoad, HasSideEffects).Analyze(Inst.TheDef);
if (Inst.mayStore) { if (MayStore)
fprintf(stderr,
"Warning: mayStore flag explicitly set on instruction '%s'"
" but flag already inferred from pattern.\n",
Inst.TheDef->getName().c_str());
MayStore = true;
}
if (Inst.mayLoad) { if (MayLoad)
fprintf(stderr,
"Warning: mayLoad flag explicitly set on instruction '%s'"
" but flag already inferred from pattern.\n",
Inst.TheDef->getName().c_str());
MayLoad = true;
}
if (Inst.neverHasSideEffects) {
if (HadPattern)
fprintf(stderr, "Warning: neverHasSideEffects set on instruction '%s' "
"which already has a pattern\n", Inst.TheDef->getName().c_str());
HasSideEffects = false;
}
if (Inst.hasSideEffects) {
if (HasSideEffects)
fprintf(stderr, "Warning: hasSideEffects set on instruction '%s' "
"which already inferred this.\n", Inst.TheDef->getName().c_str());
HasSideEffects = true;
}
}
void CodeGenDAGPatterns::ParseInstructions() {
std::vector<Record*> Instrs = Records.getAllDerivedDefinitions("Instruction");
for (unsigned i = 0, e = Instrs.size(); i != e; ++i) {
ListInit *LI = 0;
if (dynamic_cast<ListInit*>(Instrs[i]->getValueInit("Pattern")))
LI = Instrs[i]->getValueAsListInit("Pattern");
if (!LI || LI->getSize() == 0) {
std::vector<Record*> Results;
std::vector<Record*> Operands;
CodeGenInstruction &InstInfo =Target.getInstruction(Instrs[i]->getName());
if (InstInfo.OperandList.size() != 0) {
if (InstInfo.NumDefs == 0) {
for (unsigned j = 0, e = InstInfo.OperandList.size(); j < e; ++j)
Operands.push_back(InstInfo.OperandList[j].Rec);
} else {
Results.push_back(InstInfo.OperandList[0].Rec);
for (unsigned j = 1, e = InstInfo.OperandList.size(); j < e; ++j)
Operands.push_back(InstInfo.OperandList[j].Rec);
}
}
std::vector<Record*> ImpResults;
std::vector<Record*> ImpOperands;
Instructions.insert(std::make_pair(Instrs[i],
DAGInstruction(0, Results, Operands, ImpResults,
ImpOperands)));
continue; }
TreePattern *I = new TreePattern(Instrs[i], LI, true, *this);
I->InlinePatternFragments();
if (!I->InferAllTypes())
I->error("Could not infer all types in pattern!");
std::map<std::string, TreePatternNode*> InstInputs;
std::map<std::string, TreePatternNode*> InstResults;
std::vector<Record*> InstImpInputs;
std::vector<Record*> InstImpResults;
for (unsigned j = 0, e = I->getNumTrees(); j != e; ++j) {
TreePatternNode *Pat = I->getTree(j);
if (!Pat->hasTypeSet() || Pat->getType() != MVT::isVoid)
I->error("Top-level forms in instruction pattern should have"
" void types");
FindPatternInputsAndOutputs(I, Pat, InstInputs, InstResults,
InstImpInputs, InstImpResults);
}
unsigned NumResults = InstResults.size();
assert(I->getArgList().empty() && "Args list should still be empty here!");
CodeGenInstruction &CGI = Target.getInstruction(Instrs[i]->getName());
std::vector<Record*> Results;
TreePatternNode *Res0Node = NULL;
for (unsigned i = 0; i != NumResults; ++i) {
if (i == CGI.OperandList.size())
I->error("'" + InstResults.begin()->first +
"' set but does not appear in operand list!");
const std::string &OpName = CGI.OperandList[i].Name;
TreePatternNode *RNode = InstResults[OpName];
if (RNode == 0)
I->error("Operand $" + OpName + " does not exist in operand list!");
if (i == 0)
Res0Node = RNode;
Record *R = dynamic_cast<DefInit*>(RNode->getLeafValue())->getDef();
if (R == 0)
I->error("Operand $" + OpName + " should be a set destination: all "
"outputs must occur before inputs in operand list!");
if (CGI.OperandList[i].Rec != R)
I->error("Operand $" + OpName + " class mismatch!");
Results.push_back(CGI.OperandList[i].Rec);
InstResults.erase(OpName);
}
std::map<std::string, TreePatternNode*> InstInputsCheck(InstInputs);
std::vector<TreePatternNode*> ResultNodeOperands;
std::vector<Record*> Operands;
for (unsigned i = NumResults, e = CGI.OperandList.size(); i != e; ++i) {
CodeGenInstruction::OperandInfo &Op = CGI.OperandList[i];
const std::string &OpName = Op.Name;
if (OpName.empty())
I->error("Operand #" + utostr(i) + " in operands list has no name!");
if (!InstInputsCheck.count(OpName)) {
if (Op.Rec->isSubClassOf("PredicateOperand") ||
Op.Rec->isSubClassOf("OptionalDefOperand")) {
if (!getDefaultOperand(Op.Rec).DefaultOps.empty())
continue;
}
I->error("Operand $" + OpName +
" does not appear in the instruction pattern");
}
TreePatternNode *InVal = InstInputsCheck[OpName];
InstInputsCheck.erase(OpName);
if (InVal->isLeaf() &&
dynamic_cast<DefInit*>(InVal->getLeafValue())) {
Record *InRec = static_cast<DefInit*>(InVal->getLeafValue())->getDef();
if (Op.Rec != InRec && !InRec->isSubClassOf("ComplexPattern"))
I->error("Operand $" + OpName + "'s register class disagrees"
" between the operand and pattern");
}
Operands.push_back(Op.Rec);
TreePatternNode *OpNode = InVal->clone();
OpNode->clearPredicateFns();
if (Record *Xform = OpNode->getTransformFn()) {
OpNode->setTransformFn(0);
std::vector<TreePatternNode*> Children;
Children.push_back(OpNode);
OpNode = new TreePatternNode(Xform, Children);
}
ResultNodeOperands.push_back(OpNode);
}
if (!InstInputsCheck.empty())
I->error("Input operand $" + InstInputsCheck.begin()->first +
" occurs in pattern but not in operands list!");
TreePatternNode *ResultPattern =
new TreePatternNode(I->getRecord(), ResultNodeOperands);
if (NumResults > 0)
ResultPattern->setType(Res0Node->getExtType());
DAGInstruction TheInst(I, Results, Operands, InstImpResults, InstImpInputs);
Instructions.insert(std::make_pair(I->getRecord(), TheInst));
TreePattern Temp(I->getRecord(), ResultPattern, false, *this);
Temp.InferAllTypes(&I->getNamedNodesMap());
DAGInstruction &TheInsertedInst = Instructions.find(I->getRecord())->second;
TheInsertedInst.setResultPattern(Temp.getOnlyTree());
DEBUG(I->dump());
}
for (std::map<Record*, DAGInstruction, RecordPtrCmp>::iterator II =
Instructions.begin(),
E = Instructions.end(); II != E; ++II) {
DAGInstruction &TheInst = II->second;
const TreePattern *I = TheInst.getPattern();
if (I == 0) continue;
TreePatternNode *Pattern = I->getTree(0);
TreePatternNode *SrcPattern;
if (Pattern->getOperator()->getName() == "set") {
SrcPattern = Pattern->getChild(Pattern->getNumChildren()-1)->clone();
} else{
SrcPattern = Pattern;
}
Record *Instr = II->first;
AddPatternToMatch(I,
PatternToMatch(Instr->getValueAsListInit("Predicates"),
SrcPattern,
TheInst.getResultPattern(),
TheInst.getImpResults(),
Instr->getValueAsInt("AddedComplexity"),
Instr->getID()));
}
}
typedef std::pair<const TreePatternNode*, unsigned> NameRecord;
static void FindNames(const TreePatternNode *P,
std::map<std::string, NameRecord> &Names,
const TreePattern *PatternTop) {
if (!P->getName().empty()) {
NameRecord &Rec = Names[P->getName()];
if (Rec.second++ == 0)
Rec.first = P;
else if (Rec.first->getType() != P->getType())
PatternTop->error("repetition of value: $" + P->getName() +
" where different uses have different types!");
}
if (!P->isLeaf()) {
for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i)
FindNames(P->getChild(i), Names, PatternTop);
}
}
void CodeGenDAGPatterns::AddPatternToMatch(const TreePattern *Pattern,
const PatternToMatch &PTM) {
std::string Reason;
if (!PTM.getSrcPattern()->canPatternMatch(Reason, *this))
Pattern->error("Pattern can never match: " + Reason);
if (const ComplexPattern *CP =
PTM.getSrcPattern()->getComplexPatternInfo(*this))
if (CP->getRootNodes().empty())
Pattern->error("ComplexPattern at root must specify list of opcodes it"
" could match");
std::map<std::string, NameRecord> SrcNames, DstNames;
FindNames(PTM.getSrcPattern(), SrcNames, Pattern);
FindNames(PTM.getDstPattern(), DstNames, Pattern);
for (std::map<std::string, NameRecord>::iterator
I = DstNames.begin(), E = DstNames.end(); I != E; ++I) {
if (SrcNames[I->first].first == 0)
Pattern->error("Pattern has input without matching name in output: $" +
I->first);
}
for (std::map<std::string, NameRecord>::iterator
I = SrcNames.begin(), E = SrcNames.end(); I != E; ++I)
if (DstNames[I->first].first == 0 && SrcNames[I->first].second == 1)
Pattern->error("Pattern has dead named input: $" + I->first);
PatternsToMatch.push_back(PTM);
}
void CodeGenDAGPatterns::InferInstructionFlags() {
std::map<std::string, CodeGenInstruction> &InstrDescs =
Target.getInstructions();
for (std::map<std::string, CodeGenInstruction>::iterator
II = InstrDescs.begin(), E = InstrDescs.end(); II != E; ++II) {
CodeGenInstruction &InstInfo = II->second;
bool MayStore, MayLoad, HasSideEffects;
InferFromPattern(InstInfo, MayStore, MayLoad, HasSideEffects, *this);
InstInfo.mayStore = MayStore;
InstInfo.mayLoad = MayLoad;
InstInfo.hasSideEffects = HasSideEffects;
}
}
static bool ForceArbitraryInstResultType(TreePatternNode *N, TreePattern &TP) {
if (N->isLeaf())
return false;
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
if (ForceArbitraryInstResultType(N->getChild(i), TP))
return true;
if (!N->getOperator()->isSubClassOf("Instruction"))
return false;
if (N->getExtType().isCompletelyUnknown() || N->getExtType().isConcrete())
return false;
return N->getExtType().MergeInTypeInfo(N->getExtType().getTypeList()[0], TP);
}
void CodeGenDAGPatterns::ParsePatterns() {
std::vector<Record*> Patterns = Records.getAllDerivedDefinitions("Pattern");
for (unsigned i = 0, e = Patterns.size(); i != e; ++i) {
DagInit *Tree = Patterns[i]->getValueAsDag("PatternToMatch");
DefInit *OpDef = dynamic_cast<DefInit*>(Tree->getOperator());
Record *Operator = OpDef->getDef();
TreePattern *Pattern;
if (Operator->getName() != "parallel")
Pattern = new TreePattern(Patterns[i], Tree, true, *this);
else {
std::vector<Init*> Values;
RecTy *ListTy = 0;
for (unsigned j = 0, ee = Tree->getNumArgs(); j != ee; ++j) {
Values.push_back(Tree->getArg(j));
TypedInit *TArg = dynamic_cast<TypedInit*>(Tree->getArg(j));
if (TArg == 0) {
errs() << "In dag: " << Tree->getAsString();
errs() << " -- Untyped argument in pattern\n";
assert(0 && "Untyped argument in pattern");
}
if (ListTy != 0) {
ListTy = resolveTypes(ListTy, TArg->getType());
if (ListTy == 0) {
errs() << "In dag: " << Tree->getAsString();
errs() << " -- Incompatible types in pattern arguments\n";
assert(0 && "Incompatible types in pattern arguments");
}
}
else {
ListTy = TArg->getType();
}
}
ListInit *LI = new ListInit(Values, new ListRecTy(ListTy));
Pattern = new TreePattern(Patterns[i], LI, true, *this);
}
Pattern->InlinePatternFragments();
ListInit *LI = Patterns[i]->getValueAsListInit("ResultInstrs");
if (LI->getSize() == 0) continue;
TreePattern *Result = new TreePattern(Patterns[i], LI, false, *this);
Result->InlinePatternFragments();
if (Result->getNumTrees() != 1)
Result->error("Cannot handle instructions producing instructions "
"with temporaries yet!");
bool IterateInference;
bool InferredAllPatternTypes, InferredAllResultTypes;
do {
InferredAllPatternTypes =
Pattern->InferAllTypes(&Pattern->getNamedNodesMap());
InferredAllResultTypes =
Result->InferAllTypes(&Pattern->getNamedNodesMap());
IterateInference = Pattern->getTree(0)->
UpdateNodeType(Result->getTree(0)->getExtType(), *Result);
IterateInference |= Result->getTree(0)->
UpdateNodeType(Pattern->getTree(0)->getExtType(), *Result);
if (!IterateInference && InferredAllPatternTypes &&
!InferredAllResultTypes)
IterateInference = ForceArbitraryInstResultType(Result->getTree(0),
*Result);
} while (IterateInference);
if (!InferredAllPatternTypes)
Pattern->error("Could not infer all types in pattern!");
if (!InferredAllResultTypes) {
Pattern->dump();
Result->error("Could not infer all types in pattern result!");
}
std::map<std::string, TreePatternNode*> InstInputs;
std::map<std::string, TreePatternNode*> InstResults;
std::vector<Record*> InstImpInputs;
std::vector<Record*> InstImpResults;
for (unsigned j = 0, ee = Pattern->getNumTrees(); j != ee; ++j)
FindPatternInputsAndOutputs(Pattern, Pattern->getTree(j),
InstInputs, InstResults,
InstImpInputs, InstImpResults);
TreePatternNode *DstPattern = Result->getOnlyTree();
std::vector<TreePatternNode*> ResultNodeOperands;
for (unsigned ii = 0, ee = DstPattern->getNumChildren(); ii != ee; ++ii) {
TreePatternNode *OpNode = DstPattern->getChild(ii);
if (Record *Xform = OpNode->getTransformFn()) {
OpNode->setTransformFn(0);
std::vector<TreePatternNode*> Children;
Children.push_back(OpNode);
OpNode = new TreePatternNode(Xform, Children);
}
ResultNodeOperands.push_back(OpNode);
}
DstPattern = Result->getOnlyTree();
if (!DstPattern->isLeaf())
DstPattern = new TreePatternNode(DstPattern->getOperator(),
ResultNodeOperands);
DstPattern->setType(Result->getOnlyTree()->getExtType());
TreePattern Temp(Result->getRecord(), DstPattern, false, *this);
Temp.InferAllTypes();
AddPatternToMatch(Pattern,
PatternToMatch(Patterns[i]->getValueAsListInit("Predicates"),
Pattern->getTree(0),
Temp.getOnlyTree(), InstImpResults,
Patterns[i]->getValueAsInt("AddedComplexity"),
Patterns[i]->getID()));
}
}
static void CombineChildVariants(TreePatternNode *Orig,
const std::vector<std::vector<TreePatternNode*> > &ChildVariants,
std::vector<TreePatternNode*> &OutVariants,
CodeGenDAGPatterns &CDP,
const MultipleUseVarSet &DepVars) {
for (unsigned i = 0, e = ChildVariants.size(); i != e; ++i)
if (ChildVariants[i].empty())
return;
std::vector<unsigned> Idxs;
Idxs.resize(ChildVariants.size());
bool NotDone;
do {
#ifndef NDEBUG
DEBUG(if (!Idxs.empty()) {
errs() << Orig->getOperator()->getName() << ": Idxs = [ ";
for (unsigned i = 0; i < Idxs.size(); ++i) {
errs() << Idxs[i] << " ";
}
errs() << "]\n";
});
#endif
std::vector<TreePatternNode*> NewChildren;
for (unsigned i = 0, e = ChildVariants.size(); i != e; ++i)
NewChildren.push_back(ChildVariants[i][Idxs[i]]);
TreePatternNode *R = new TreePatternNode(Orig->getOperator(), NewChildren);
R->setName(Orig->getName());
R->setPredicateFns(Orig->getPredicateFns());
R->setTransformFn(Orig->getTransformFn());
R->setType(Orig->getExtType());
std::string ErrString;
if (!R->canPatternMatch(ErrString, CDP)) {
delete R;
} else {
bool AlreadyExists = false;
for (unsigned i = 0, e = OutVariants.size(); i != e; ++i)
if (R->isIsomorphicTo(OutVariants[i], DepVars)) {
AlreadyExists = true;
break;
}
if (AlreadyExists)
delete R;
else
OutVariants.push_back(R);
}
int IdxsIdx;
for (IdxsIdx = Idxs.size() - 1; IdxsIdx >= 0; --IdxsIdx) {
if (++Idxs[IdxsIdx] == ChildVariants[IdxsIdx].size())
Idxs[IdxsIdx] = 0;
else
break;
}
NotDone = (IdxsIdx >= 0);
} while (NotDone);
}
static void CombineChildVariants(TreePatternNode *Orig,
const std::vector<TreePatternNode*> &LHS,
const std::vector<TreePatternNode*> &RHS,
std::vector<TreePatternNode*> &OutVariants,
CodeGenDAGPatterns &CDP,
const MultipleUseVarSet &DepVars) {
std::vector<std::vector<TreePatternNode*> > ChildVariants;
ChildVariants.push_back(LHS);
ChildVariants.push_back(RHS);
CombineChildVariants(Orig, ChildVariants, OutVariants, CDP, DepVars);
}
static void GatherChildrenOfAssociativeOpcode(TreePatternNode *N,
std::vector<TreePatternNode *> &Children) {
assert(N->getNumChildren()==2 &&"Associative but doesn't have 2 children!");
Record *Operator = N->getOperator();
if (!N->getName().empty() || !N->getPredicateFns().empty() ||
N->getTransformFn()) {
Children.push_back(N);
return;
}
if (N->getChild(0)->isLeaf() || N->getChild(0)->getOperator() != Operator)
Children.push_back(N->getChild(0));
else
GatherChildrenOfAssociativeOpcode(N->getChild(0), Children);
if (N->getChild(1)->isLeaf() || N->getChild(1)->getOperator() != Operator)
Children.push_back(N->getChild(1));
else
GatherChildrenOfAssociativeOpcode(N->getChild(1), Children);
}
static void GenerateVariantsOf(TreePatternNode *N,
std::vector<TreePatternNode*> &OutVariants,
CodeGenDAGPatterns &CDP,
const MultipleUseVarSet &DepVars) {
if (N->isLeaf()) {
OutVariants.push_back(N);
return;
}
const SDNodeInfo &NodeInfo = CDP.getSDNodeInfo(N->getOperator());
if (NodeInfo.hasProperty(SDNPAssociative)) {
std::vector<TreePatternNode*> MaximalChildren;
GatherChildrenOfAssociativeOpcode(N, MaximalChildren);
if (MaximalChildren.size() == 3) {
std::vector<TreePatternNode*> AVariants, BVariants, CVariants;
GenerateVariantsOf(MaximalChildren[0], AVariants, CDP, DepVars);
GenerateVariantsOf(MaximalChildren[1], BVariants, CDP, DepVars);
GenerateVariantsOf(MaximalChildren[2], CVariants, CDP, DepVars);
std::vector<TreePatternNode*> ABVariants;
std::vector<TreePatternNode*> BAVariants;
std::vector<TreePatternNode*> ACVariants;
std::vector<TreePatternNode*> CAVariants;
std::vector<TreePatternNode*> BCVariants;
std::vector<TreePatternNode*> CBVariants;
CombineChildVariants(N, AVariants, BVariants, ABVariants, CDP, DepVars);
CombineChildVariants(N, BVariants, AVariants, BAVariants, CDP, DepVars);
CombineChildVariants(N, AVariants, CVariants, ACVariants, CDP, DepVars);
CombineChildVariants(N, CVariants, AVariants, CAVariants, CDP, DepVars);
CombineChildVariants(N, BVariants, CVariants, BCVariants, CDP, DepVars);
CombineChildVariants(N, CVariants, BVariants, CBVariants, CDP, DepVars);
CombineChildVariants(N, ABVariants, CVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, BAVariants, CVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, ACVariants, BVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, CAVariants, BVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, BCVariants, AVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, CBVariants, AVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, CVariants, ABVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, CVariants, BAVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, BVariants, ACVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, BVariants, CAVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, AVariants, BCVariants, OutVariants, CDP, DepVars);
CombineChildVariants(N, AVariants, CBVariants, OutVariants, CDP, DepVars);
return;
}
}
std::vector<std::vector<TreePatternNode*> > ChildVariants;
ChildVariants.resize(N->getNumChildren());
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
GenerateVariantsOf(N->getChild(i), ChildVariants[i], CDP, DepVars);
CombineChildVariants(N, ChildVariants, OutVariants, CDP, DepVars);
bool isCommIntrinsic = N->isCommutativeIntrinsic(CDP);
if (NodeInfo.hasProperty(SDNPCommutative) || isCommIntrinsic) {
assert((N->getNumChildren()==2 || isCommIntrinsic) &&
"Commutative but doesn't have 2 children!");
unsigned NC = 0;
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
TreePatternNode *Child = N->getChild(i);
if (Child->isLeaf())
if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
Record *RR = DI->getDef();
if (RR->isSubClassOf("Register"))
continue;
}
NC++;
}
if (isCommIntrinsic) {
assert(NC >= 3 &&
"Commutative intrinsic should have at least 3 childrean!");
std::vector<std::vector<TreePatternNode*> > Variants;
Variants.push_back(ChildVariants[0]); Variants.push_back(ChildVariants[2]);
Variants.push_back(ChildVariants[1]);
for (unsigned i = 3; i != NC; ++i)
Variants.push_back(ChildVariants[i]);
CombineChildVariants(N, Variants, OutVariants, CDP, DepVars);
} else if (NC == 2)
CombineChildVariants(N, ChildVariants[1], ChildVariants[0],
OutVariants, CDP, DepVars);
}
}
void CodeGenDAGPatterns::GenerateVariants() {
DEBUG(errs() << "Generating instruction variants.\n");
for (unsigned i = 0, e = PatternsToMatch.size(); i != e; ++i) {
MultipleUseVarSet DepVars;
std::vector<TreePatternNode*> Variants;
FindDepVars(PatternsToMatch[i].getSrcPattern(), DepVars);
DEBUG(errs() << "Dependent/multiply used variables: ");
DEBUG(DumpDepVars(DepVars));
DEBUG(errs() << "\n");
GenerateVariantsOf(PatternsToMatch[i].getSrcPattern(), Variants, *this, DepVars);
assert(!Variants.empty() && "Must create at least original variant!");
Variants.erase(Variants.begin());
if (Variants.empty()) continue;
DEBUG(errs() << "FOUND VARIANTS OF: ";
PatternsToMatch[i].getSrcPattern()->dump();
errs() << "\n");
for (unsigned v = 0, e = Variants.size(); v != e; ++v) {
TreePatternNode *Variant = Variants[v];
DEBUG(errs() << " VAR#" << v << ": ";
Variant->dump();
errs() << "\n");
bool AlreadyExists = false;
for (unsigned p = 0, e = PatternsToMatch.size(); p != e; ++p) {
if (PatternsToMatch[i].getPredicates() !=
PatternsToMatch[p].getPredicates())
continue;
if (Variant->isIsomorphicTo(PatternsToMatch[p].getSrcPattern(), DepVars)) {
DEBUG(errs() << " *** ALREADY EXISTS, ignoring variant.\n");
AlreadyExists = true;
break;
}
}
if (AlreadyExists) continue;
PatternsToMatch.
push_back(PatternToMatch(PatternsToMatch[i].getPredicates(),
Variant, PatternsToMatch[i].getDstPattern(),
PatternsToMatch[i].getDstRegs(),
PatternsToMatch[i].getAddedComplexity(),
Record::getNewUID()));
}
DEBUG(errs() << "\n");
}
}